Magnitude-4.7 quake felt throughout Southern California

A magnitude-4.7 earthquake rattled Southern California on Monday morning, shaking residents from Riverside County all the way to the western reaches of the San Fernando Valley.

The quake, centered in Anza in Riverside County, occurred along the San Jacinto fault, not the more notorious San Andreas fault, experts said.

"The San Jacinto fault is actually a complex zone of faults that parallels the San Andreas on the west side," Caltech seismologist Kate Hutton said. "It goes from the area of the Salton Sea up toward L.A. County. "

Anza is located more than 100 miles southeast of downtown Los Angeles.

The San Jacinto fault has been active in the past, Hutton said.

"This is really nothing surprising for the Anza area," she said.

There were no reports of damage or injuries.

Initial data from the U.S. Geological Survey showed several small earthquakes, but those were foreshocks misidentified by Caltech and USGS computers, Hutton said.

While the quake was strong enough to put Caltech scientists and emergency workers on high alert, the temblor barely registered with many Southland residents.

"The city will certainly check to make sure no city facilities were damaged," Pasadena spokesman William Boyer said. "Right now, there is no damage that I am aware of. "